Check coordinates of signs before using them to read pmap or pressure

1 files changed, 7 insertions, 4 deletions

diff --git a/src/graphics.c b/src/graphics.c
index aa72139..c460725 100644
--- a/src/graphics.c
+++ b/src/graphics.c
@@ -3056,15 +3056,18 @@ void render_signs(pixel *vid_buf)
 			//Displaying special information
 			if (strcmp(signs[i].text, "{p}")==0)
 			{
-				sprintf(buff, "Pressure: %3.2f", pv[signs[i].y/CELL][signs[i].x/CELL]);  //...pressure
+				float pressure = 0.0f;
+				if (signs[i].x>=0 && signs[i].x<XRES && signs[i].y>=0 && signs[i].y<YRES)
+					pressure = pv[signs[i].y/CELL][signs[i].x/CELL];
+				sprintf(buff, "Pressure: %3.2f", pressure);  //...pressure
 				drawtext(vid_buf, x+3, y+3, buff, 255, 255, 255, 255);
 			}
 			if (strcmp(signs[i].text, "{t}")==0)
 			{
-				if (pmap[signs[i].y][signs[i].x])
-					sprintf(buff, "Temp: %4.2f", parts[pmap[signs[i].y][signs[i].x]>>8].temp-273.15);  //...tempirature
+				if (signs[i].x>=0 && signs[i].x<XRES && signs[i].y>=0 && signs[i].y<YRES && pmap[signs[i].y][signs[i].x])
+					sprintf(buff, "Temp: %4.2f", parts[pmap[signs[i].y][signs[i].x]>>8].temp-273.15);  //...temperature
 				else
-					sprintf(buff, "Temp: 0.00");  //...tempirature
+					sprintf(buff, "Temp: 0.00");  //...temperature
 				drawtext(vid_buf, x+3, y+3, buff, 255, 255, 255, 255);
 			}